122642056161 has 6 divisors (see below), whose sum is σ = 177149636690. Its totient is φ = 81761370768.

The previous prime is 122642056157. The next prime is 122642056177. The reversal of 122642056161 is 161650246221.

122642056161 is a `hidden beast` number, since 1 + 2 + 2 + 642 + 0 + 5 + 6 + 1 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 110835060561 + 11806995600 = 332919^2 + 108660^2 .

It is not a de Polignac number, because 122642056161 - 2² = 122642056157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122642056111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6813447556 + ... + 6813447573.

Almost surely, 2^122642056161 is an apocalyptic number.

It is an amenable number.

122642056161 is a deficient number, since it is larger than the sum of its proper divisors (54507580529).

122642056161 is a wasteful number, since it uses less digits than its factorization.

122642056161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13626895135 (or 13626895132 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 122642056161 in words is "one hundred twenty-two billion, six hundred forty-two million, fifty-six thousand, one hundred sixty-one".